Practice Test: Question Set - 28
1. When the belt is stationary, it is subjected to some tension known as initial tension. The value of this tension is equal to the
- (A) Tension
in the tight side of the belt
- (B) Tension in
the slack side of the belt
- (C) Sum
of the tensions on the tight side and slack side of the belt
- (D) Average
tension of the tight side and slack side of the belt
2. Typewriter constitutes
- (A) Machine
- (B) Structure
- (C) Mechanism
- (D) Inversion
3. A mechanism consisting of four links is called a __________ mechanism.
- (A) Simple
- (B) Compound
- (C) Binary
- (D) None of
these
4. The Klein's diagram is used when
- (A) Crank has
uniform angular velocity
- (B) Crank has
nonuniform angular velocity
- (C) Crank
has uniform angular acceleration
- (D) Crank
has nonuniform angular acceleration
5. Which of the following statement is correct as regard to the difference between a machine and a structure?
- (A) The parts of
a machine move relative to one another, whereas the members of a structure do
not move relative to one another
- (B) The links of
a machine may transmit both power and motion, whereas the members of a
structure transmit forces only
- (C) A machine
transforms the available energy into some useful work, whereas in a structure
no energy is transformed into useful work
- (D) All of the
above
6. A pantograph is a mechanism with
- (A) Lower pairs
- (B) Higher pairs
- (C) Rolling pairs
- (D) Turning pairs
7. A rigid body possesses ________degrees of freedom
- (A) One
- (B) Two
- (C) Four
- (D) Six
8. When the particles of a body moves perpendicular to its axis, then the body is said to have
- (A) Longitudinal
vibration
- (B) Transverse
vibration
- (C) Torsional
vibration
- (D) None of
these
9. Which type of gear train is used in clock mechanism to join hour hand and minute hand?
- (A) Simple gear train
- (B) Compound gear train
- (C) Reverted gear train
- (D) Epicyclic gear train
10. The equation of motion for a single degree of freedom system with viscous damping is 4(dx²/dt²) + 9(dx/dt) + 16x. The damping ratio of the system is
- (A) 9/8
- (B) 9/82
- (C) 9/16
- (D) 9/128
11. The flank of the tooth is the surface of the tooth __________ the pitch surface.
- (A) Above
- (B) Below
- (C) At
- (D) None of
these
12. When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a
- (A) Screw pair
- (B) Spherical
pair
- (C) Turning pair
- (D) Sliding pair
13. The frequency of oscillation of a torsional pendulum is
- (A) 2πk/r. √(g/l)
- (B) r/2πk. √(l/g)
- (C) 2πr/k. √(g/l)
- (D) r/2πk. √(g/l)
14. The velocity of sliding of meshing gear teeth is
(Where ω₁ and ω₂ are angular velocities of
meshing gears and ‘y’ is distance between point of contact and the pitch point)
- (A) (ω₁ + ω₂) y
- (B) (ω₁/ω₂) y
- (C) (ω₁ × ω₂) y
- (D) (ω₁ + ω₂)/y
15. The pressure angle of a cam is the angle between the direction of the follower motion and a normal to the
- (A) Pitch circle
- (B) Base circle
- (C) Pitch curve
- (D) Prime circle
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